Mr Copland, 63, cover for galaxy s3 didn't return home on Sunday afternoon as planned after going fly fishing alone at the mouth of the Makarora River.
He was a Justice of the Peace, marriage celebrant and member of Wanaka Community Board.
Police say that searchers from the Police Search and Rescue, LandSAR and Wanaka Coastguard recovered Mr Copland's body at about 5pm on Monday in the lake about 1km north of Boundary Creek.
Family members had raised the alarm when he had not returned home on Sunday.
A fly fishing backpack and Labrador dog belonging to Mr Copland were found on a gravel island at the mouth of the river on Monday morning, cloud computing companies along with a set of footprints leading into the water.
Senior Constable Mike Johnston said it looked like Mr Copland had waded into the water and onto a terrace off the gravel island.
He likely slipped off the edge of the terrace into the flow of the river and into the lake wigs long hair.
His death has been referred to the coroner.